The working principle of boiler dust collector: The guide pipe enters the cooling device for treatment before entering the bag dust collector. Dust collector for boiler. Under the guidance of the ash hopper guide system, the large particle dust is separated and directly falls into the ash hopper. The remaining dust enters the filtering room of each unit, and is guided by the flue gas distribution device to enter the filtering room in all aspects. The airflow enters the filtering area of the middle box, and the filtered clean gas passes through the filter bag and is discharged through the upper box, lifting valve, and exhaust pipe. As the filtration progresses, when a certain amount of dust accumulates on the surface of the filter bag, the dust removal control device closes the lifting valve according to the set program, opens the electromagnetic pulse valve for spraying, shakes off the dust on the filter bag, and falls into the ash hopper and is discharged through the ash discharge valve.